Midnight Wanderer

 is a quest in Bastard's Wound. This quest is available once you've completed either Tide Together or Knapping on the Job.

Synopsis
Eisly is concerned about why Insipid Moniker is disappearing into the Oldwalls for hours during the dead of night. She's asked you to follow Insipid one of these nights and find out what she is up to.

Eisly said Insipid Moniker only ventures into the Oldwalls at a specific time of night. Talk to her about when that is.

Walkthrough

 * Talk to Eisly and agree to track Insipid Moniker. Note that the "Wait till night" option counts as resting. Use the teleporter in the south and follow her.
 * You won't get far, as she erects a barrier of fire in the Oldwalls, blocking you from following her. Ask Eisly about it.
 * She will suggest talking to Telesophia about where Insipid Moniker might be hiding an item that can bring down the fire barrier. If you need a hint, talk to Telesophia. If you kill Argaen or lead her to believe you have, Telesophia will reveal that it is hidden in a hole in a wall, behind a Scarlet Chorus banner.
 * If you don't, and have enough Subterfuge, just head over to the ex-Chorusmen camp near Wagstaff and check near the tents.
 * With Insipid Moniker's Talisman in hand, return to the fire barrier in the Darkened Hollow.
 * Enter the room to find Insipid Moniker's little blood farm. The options are to kill her, thus depriving Wagstaff of a source of blood for his enchantments, dismantle the operation, or assume it's necessary for the Wound's continued operation.
 * Return to Eisly. Note that informing her of Tonves's deeds in Gambler's Ruin may bug the quest. Just lie or Intimidate her to complete the quest; intimidation will prevent you from chatting with her again.